Question juridique clé
Whether the complaint in civil matters was admissible despite the challenged decision being a revision ruling in a Hague child return case.
Solution extraite
Yes. Child-return decisions under the Hague Child Abduction Convention are public-law matters in the meaning of Art. 72 para. 2 let. b no. 1 BGG, and this also applies when return is requested in revision proceedings.
Motifs extraits
The proceeding concerns mutual legal assistance between contracting states and the enforcement of foreign civil law, not an ordinary civil case.